| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an abnormal data detecting system and abnormal data detecting program for determining whether access data is normal or not even for the access data not stored beforehand. <P>SOLUTION: The abnormal data detecting system includes a data analyzing means 11 for calculating a feature value for indicating the feature of the abnormal data based on parameter values included in the access data, a feature value accumulating means 16 for accumulating to store calculated feature quantities, a statistical information storing means 15 for storing statistical information including an average value and standard deviation of the feature quantities, and the number of accesses, a statistical processing means 14 for producing the statistical information including the average value and standard deviation of the feature quantities and the number of accesses stored in the feature value accumulating means 16 and updating the statistical information stored in the statistical information storing means 15, an accesses determining means 12 for determining the number of accesses in the past relating to input access data, and a statistical abnormality determining means 13 for determining whether the input access data is normal or not based on the results of determination. <P>COPYRIGHT: (C)2009,JPO&INPIT |
